Abstract

Dielectric properties of (platinum) composites prepared using conventional ceramic method were investigated. Dense complex ceramics were obtained without chemical reaction between and Pt during sintering processes. The relative permittivity of was increased by the addition of Pt particles nearly up to the percolation threshold of as predicted using normalized percolation theory. The maximum of 2150 at was obtained for the composite including Pt due to the increased electric field around Pt particles. Using finite difference time domain method, the increase of electric field in the direction of applied electric field was confirmed visually in the vicinity of the embedded metal particles.

Received 18 April 2006Accepted 25 August 2006Published online 12 October 2006

Acknowledgments:

One of the authors (W.W.C.) acknowledges the Japan Society for Promotion of Science (JSPS) for financial assistance. This work was supported by a grant from NITECT 21st Century COE Program “World Ceramics Center for Environment Harmony.”